4385331725

Appears in sequences

• Consider Pythagorean triples which satisfy X^2+(X+7)^2=Z^2; sequence gives increasing values of Z.at n=23A060569
• a(0)=-4, a(1)=5; thereafter a(n) = 2*a(n-1) + a(n-2).at n=25A221174
• Part of the positive proper solutions y of the Pell equation x^2 - 2*y^2 = - 7^2 based on the fundamental solution (x0, y0)= (1, 5).at n=12A254759